/* 导航 */
.nav {
    display: flex;
    flex-flow: wrap;
    padding: 34px 10px 0;
    margin-bottom: 10px;
}
.nav-item {
    width: 25%;
    margin-bottom: 20px;
}
.nav-link{
    display: flex;
    flex-direction: column;
    align-items: center;
}
.nav-img{
    width: 11.7333vw;
    margin-bottom: 5px;
}
.nav-text {
    font-size: 12px;
    color: #999;
}